TWI383209B - Liquid crystal display - Google Patents

Description

LCD panel

The present invention relates to a structure of a liquid crystal display panel.

The rapid advancement of the multimedia society has largely benefited from the dramatic advances in semiconductor components or display devices. As for the display panel, a liquid crystal display (LCD) having high image quality, good space utilization efficiency, low power consumption, and no radiation has gradually become the mainstream of the market.

In general, the three main steps of the liquid crystal display panel (TFT-LCD) include: (1) thin film transistor (TFT) array substrate segment (Arrary) (2) panel assembly segment (Cell) (3) module package (Module Assembly). The process of the substrate of the thin film transistor array is very similar to that of the semiconductor process. First, the alkali-free glass substrate must be cleaned, and then a thin film process and a transparent electrode layer are formed by a multilayer film film forming process (Thin Film Process), and then subjected to photoresist coating. The process of cloth, exposure, development, etching, and photoresist stripping can be repeated to produce the required lines and components to form a thin film transistor (TFT) array substrate.

In the panel assembly stage, the cleaned color filter substrate and the thin film transistor (TFT) array substrate are coated with the alignment film coating liquid, and rubbed and oriented. Then, a sealant is applied around the substrate of the thin film transistor (TFT) array, and a spacer of 5 to 10 μm is spread on the support point, and the thin film transistor array substrate and the color filter are further disposed. The substrate is combined and sealed with a sealant to form an empty liquid crystal cell. There are two ways to make the liquid crystal injection project. The empty liquid crystal cell can be cut into pieces, and the size of the final display product must be taken. After the inspection, the liquid crystal material is injected into the vacuum. Sealed; or first poured into the liquid crystal, cut and cut the film and then seal. Finally, after the phase difference plate and the polarizing plate are attached to the outer layer, the assembly of the liquid crystal display panel (TFT-LCD) is completed.

In the module packaging process, the assembled liquid crystal display panel (TFT-LCD) panel is connected to a driving circuit board (IC), a printed circuit board (PCB), and a backlight (Backlight Module) and a fixed frame (Frame) are mounted. ) The assembly of the liquid crystal display panel module is completed. The process of forming the in-plane support (Cell Gap) in the liquid crystal display panel (TFT-LCD) can be simply divided into two types. As shown in FIG. 1, the liquid crystal display panel 100 is composed of a thin film transistor array substrate 110 and a color filter. The light substrate 120 is formed, and the liquid crystal 130 is encapsulated in the liquid crystal display panel 100 by the sealant 150, and the process of the spacer 140 is mainly formed by the scattering machine sprinkling the spacer 140 (Spacer) to form an in-plane. support. 2 is a schematic cross-sectional view of another conventional liquid crystal display panel. In the present embodiment, the same reference numerals are used to refer to the same or similar functions/structures, and the same repetitions are not described again. The liquid crystal display panel 200 has a photo spacer (240) process mainly designed on the color filter substrate 120 (Color Filter, CF) to form an in-plane support.

In the current generation of liquid crystal display panels, liquid crystal injection mass production technology uses the One Drop filling (ODF) process, which can greatly shorten the time required to inject liquid crystal, but the instillation filling (ODF) process exists. One of the key bottlenecks is that the margin of liquid crystal filling is insufficient, that is, the range of tolerance of the liquid crystal filling amount allowed under the condition of the low temperature bubble test is too small. Referring to FIG. 3, when the liquid crystal filling amount is inaccurate (the liquid crystal is insufficient or excessive), or the photoresist spacer between the color filter substrate 320 and the thin film transistor array substrate 310 is highly deviated, it is easy to generate at a low temperature. Vacuum bubble A (vacuum bubble means that the liquid crystal shrinks at a low temperature, causing a vacuum gap in the liquid crystal cell). However, if the panel with insufficient or excessive liquid crystal fails to be reworked, it will be scrapped directly, which will increase the product cost. The method for increasing the margin of liquid crystal filling includes: forming a photoresist spacer by using a material having a lower hardness, reducing a contact area between the photoresist spacer and the thin film transistor array substrate 310, and increasing a distance between the sealant 350 and the black matrix 360. This is to make the in-plane support (Cell Gap) have a space to adjust in the process to match the amount of liquid crystal filled.

In view of the above, an object of the present invention is to provide a structure of a liquid crystal display panel. The structure of the liquid crystal display panel can not only solve the problem of uneven chromaticity caused by insufficient liquid crystal filling amount, but also improve the filling amount of liquid crystal. Degree, and thus the scrapping cost can be effectively reduced.

According to an object of the present invention, a structure of a liquid crystal display panel is provided. The structure comprises a color filter substrate having a substrate and a light shielding layer, wherein the surface of the light shielding layer around the substrate has at least one recess receiving space. A thin film transistor array substrate and a liquid crystal layer are encapsulated between the thin film transistor array substrate and the color filter substrate by a sealant.

In the above structure of the liquid crystal display panel, the light shielding layer is a black matrix.

In the above structure of the liquid crystal display panel, the material of the black matrix is chromium.

In the above structure of the liquid crystal display panel, the material of the black matrix is a resin.

In the above structure of the liquid crystal display panel, the light shielding layer is a color layer stacked layer.

In the above structure of the liquid crystal display panel, the color layer stack layer is a red color layer, and a green color layer and a blue color layer are arbitrarily combined.

In the above structure of the liquid crystal display panel, the material of the color layer stack layer is a resin.

In the above structure of the liquid crystal display panel, the shape of the recessed receiving space is a polygonal column shape, a circular column shape or an elliptical column shape.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

4 is a cross-sectional view of a liquid crystal display panel in accordance with a preferred embodiment of the present invention. Figure 5 is a partial top plan view of a color filter substrate in accordance with a preferred embodiment of the present invention. Referring to FIG. 4 and FIG. 5 simultaneously, the liquid crystal display panel 400 of the preferred embodiment of the present invention includes a thin film transistor array substrate 410, a color filter substrate 420, a sealant 450, a light shielding layer 460, and a thin film electricity. A liquid crystal layer (not shown) between the crystal array substrate 410 and the color filter substrate 420. The liquid crystal layer is encapsulated in the thin film transistor array substrate 410 and the color filter substrate 420 by the sealant 450.

The color filter substrate 420 includes a substrate 421 and a light shielding layer 460. The light shielding layer 460 is partially disposed on the peripheral surface of the substrate 421, and the surface of the light shielding layer 460 around the substrate 421 has at least one recess receiving space B. The sealant 450 is located beside the light-shielding layer 460 around the thin film transistor array substrate 410 and the corresponding substrate 421. At least one recessed receiving space B is located on the surface of the light shielding layer 460 of the color filter substrate 420 to form a liquid crystal overflow pool, which can accumulate excessive or insufficient liquid crystal amount on the surface of the light shielding layer 460 around the substrate 421. Space B, the present invention is designed to increase the liquid crystal margin (LC Margin), wherein the shape of the recessed receiving space B is a polygonal column shape, a circular column shape or an elliptical column shape. In the above structure of the liquid crystal display panel 400, the light shielding layer 460 is a black matrix, and the black matrix is made of chromium or resin.

In the above structure of the liquid crystal display panel 400, the light shielding layer 460 is a color layer stacked layer, and the color layer stacking layer is a red color layer, a green color layer and a blue color layer are arbitrarily combined, and the material thereof is Resin.

Referring to Table 1, in a preferred embodiment of the present invention, the height of the light shielding layer 460 around the substrate 421 is 1.2 um, and the light shielding layer 460 around the substrate 421 is used for all hollowed out conditions to calculate the liquid crystal margin. (LC Margin) The maximum value that can be obtained is the increase in the LC Margin of each model size. The data is shown in Table 1. In the 32-inch panel, the liquid crystal in the panel fills a volume of about 1030.29 mm ³ , and the light-shielding layer 460 around the substrate 421 has a volume of about 11.96 mm ³ , and the liquid crystal margin increases by about 1.16%. In the 17-inch panel, the liquid crystal in the panel fills a volume of about 334.73 mm ³ , and the light-shielding layer 460 around the substrate 421 has a volume of about 4.44 mm ³ , and the liquid crystal margin increases by about 1.33%. In the 8-inch panel, the liquid crystal in the panel fills a volume of about 73.54 mm ³ , and the light-shielding layer 460 around the substrate 421 has a volume of about 1.62 mm ³ , and the liquid crystal margin increases by about 2.20%. In 4-inch panel, the liquid crystal panel to fill a volume of about 20.77mm ^3, the substrate 421 and the light shielding layer volume of about four weeks 0.99mm ^3, the liquid crystal margin increases a ratio of about 4.77%. From this table, it can be seen that the present invention is applicable to various sizes and models, and the smaller the size, the larger the liquid crystal margin (LC Margin) can be increased, which means that the liquid crystal dropping precision of the small and medium-sized panel can be solved by this design. Control problem.

Table 1 shows the results of experiments in accordance with a preferred embodiment of the present invention.

In summary, in the structure of the liquid crystal display panel of the present invention, the light shielding layer may be a black matrix or arbitrarily combined by different color layers, and the light shielding layer has a recessed receiving space. In this way, the recessed accommodating space can be used as a buffer space for insufficient or excessive liquid crystal, and the problem of uneven chromaticity caused by insufficient liquid crystal filling amount can be solved, and the probability of panel heavy work loss can be reduced, thereby reducing the production cost. .

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100, 200, 300, 400. . . LCD panel

110, 310, 410. . . Thin film transistor array substrate

120, 320, 420. . . Color filter substrate

130. . . liquid crystal

140. . . Interstitial

150, 350, 450. . . Frame glue

240. . . Resistor spacer

360. . . Black matrix

421. . . Base

460. . . Shading layer

A. . . Vacuum bubble

B. . . Sag receiving space

1 is a schematic cross-sectional view of a conventional liquid crystal display panel

2 is a schematic cross-sectional view of another conventional liquid crystal display panel.

FIG. 3 is a schematic cross-sectional view showing a conventional liquid crystal display panel with insufficient liquid crystal concentration area.

4 is a cross-sectional view of a liquid crystal display panel in accordance with a preferred embodiment of the present invention.

Figure 5 is a partial top plan view of a color filter substrate in accordance with a preferred embodiment of the present invention.

400. . . LCD panel

410. . . Thin film transistor substrate

420. . . Color filter substrate

450. . . Frame glue

460. . . Shading layer

B. . . Sag receiving space

Claims (8)

A structure of a liquid crystal display panel comprising: a color filter substrate having a substrate and a light shielding layer, wherein a surface of the light shielding layer around the substrate has at least one recess receiving space; a thin film transistor array substrate; The liquid crystal layer is encapsulated between the thin film transistor array substrate and the color filter substrate by a sealant. The structure of the liquid crystal display panel of claim 1, wherein the light shielding layer is a black matrix. The structure of the liquid crystal display panel according to claim 2, wherein the black matrix is made of chromium. The structure of the liquid crystal display panel according to claim 2, wherein the black matrix is made of a resin. The structure of the liquid crystal display panel of claim 1, wherein the light shielding layer is a color layer stacked layer. The structure of the liquid crystal display panel according to claim 5, wherein the color layer stacking layer is formed by any combination of a red color layer, a green color layer and a blue color layer. The structure of the liquid crystal display panel of claim 5, wherein the color layer stacking layer is made of a resin. The structure of the liquid crystal display panel of claim 1, wherein the recessed receiving space has a polygonal column shape, a circular column shape or an elliptical column shape.